Gutenberg Block Filter Hook Key

I’m wanting to add some functionality to the featured image block in the Gutenberg editor. I’ve got pretty close: The problem is, I’m unable to select an image, and posts…

just download posting a form

my engine looks like this ( no more steps) [REGISTER_STEP1]modify url=%register_link% just download=1 variable must be used=%your e-mail% and SER submitted a form, why ? Edit: it should be variable must…